One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,9,6,10,4,7)(3,11,14,8,12,16,13,15)(17,18,21,24,22,26,20,25)(19,27,29,23,30,31,28,32)(2,7,10,9)(8,11,15,16)(17,19)(18,23,26,32)(20,28)(21,29)(22,30)(24,31,25,27)(1,3)(2,8)(4,13)(5,14)(6,12)(7,11)(9,16)(10,15)(18,24)(20,21)(23,31)(25,26)(27,32)(28,29) involution — undirected(3,12)(8,15)(11,16)(13,14)(17,20,22,21)(18,24,26,25)(19,28,30,29)(23,31,32,27)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.